DataVXACS Applied Materials & InterfacesPaper
journal article·2015-04-22

Charge Generation Layers for Solution Processed Tandem Organic Light Emitting Diodes with Regular Device Architecture

Stefan Höfle, Christoph Bernhard, Michael Bruns, Christian Kübel, Torsten Scherer, Uli Lemmer, Alexander Colsmann

ACS Applied Materials & Interfaces· Volume 7· Issue 15
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Source abstract

Abstract

Tandem organic light emitting diodes (OLEDs) utilizing fluorescent polymers in both sub-OLEDs and a regular device architecture were fabricated from solution, and their structure and performance characterized. The charge carrier generation layer comprised a zinc oxide layer, modified by a polyethylenimine interface dipole, for electron injection and either MoO3, WO3, or VOx for hole injection into the adjacent sub-OLEDs. ToF-SIMS investigations and STEM-EDX mapping verified the distinct functional layers throughout the layer stack. At a given device current density, the current efficiencies of both sub-OLEDs add up to a maximum of 25 cd/A, indicating a properly working tandem OLED.
Source: openalex_inverted_index · Quality: baseline

Research context

Polymers

OpenAlex topics: Organic Light-Emitting Diodes Research · Organic Electronics and Photovoltaics · Thin-Film Transistor Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Light Technology Institute, Karlsruhe Institute of Technology (KIT), Engesserstrasse 13, 76131 Karlsruhe, Germany

Institute for Applied Materials, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Institute for Microstructure Technology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Funding

Bundesministerium für Bildung und Forschung · Deutsche Forschungsgemeinschaft · Land Baden-Württemberg

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